Geain reduction machine



(No Model.) 4 Sheets-Sheet 1-.

J. M. CASE.

GRAIN REDUCTION MACHINE.

No. 259,479. Patented June 13, 1882.

(No Model.) 4-'Shjeets--Sheet 2.

' J. M. CASE.

GRAIN REDUCTION MAOHINE.

No. 259,479. Patented June 13, 1882.

llllllllll llllllllil 4 Sheets-Sheet 3.

(No Model.) 7

J. M. CASE.

GRAIN REDUCTION MACHINE.

Patented June 13 (H0 ModelJ- 4 Sheets-Sheet 4.v

J. M. CASE.

GRAIN REDUCTION MACHINE.

.No. 259,479. Patented June 13, 1882.

JOHN M. CASE, OF COLUMBUS, OHIO,

PATENT FFICE.

ASSIGNOR TO THE CASE MANUFAC- TURING COMPANY, OF SAME PLACE.

GRAIN-REDUCTION MACHINE.

' SPECIFICATION forming part of Letters Patent No. 259,479, dated June 13, 1882.

Application filed February 11, 1882. (No model.)

To all whom it may concern Be it known that I, JOHN M. CASE, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain Improvements in Grain-Reduction Machines, of which the following is a specification.

My machine is constructed with a pair of cracking or crushing rolls, to which a differential motion is imparted by a common belt passing around pulleys of difierent diameter on the roller-shafts, and around a third pulley on a shaft carrying an eccentric or pair of cocentrics employed to vibrate a feed-box, the shaking movement of which maintains a more constant and uniform supply to the rolls than is practicable with the roller-feed commonly employed in connection with reducing-rolls. The belt also passes around a tightening-roll. By thus using one common belt on the four pulleysI provide sufficient frictional resistance to adapt it to hold back on the slower of the two reducing-rolls and prevent the liability of slipping which occurs under the customary mode of imparting a difi'erential movement to reducing-rolls by the use of two belts driven by differential pulleys on one shaft.

In order that the invention and the manner of carrying it into efiect may be fully understood, I will describe it in connection with the accompanying drawings, in which- Figure l is a perspective view of the machine. Fig. 1 is a perspective view of the feed-box with adjacent parts. Fig. 2 is an elevation of the opposite side thereof on a larger scale. Fig. 3 is a section on the line 3 3, Fig.

2, of the belt-tightening device.- Fig. 4. is a side elevation, partly in section, to illustrate the mode of adjusting the reducing-rolls for grading the cracking or crushing. Fig. 5 is a central vertical transverse section.

A B are a pair of reducing hollow rolls, the former of which may run in fixed boxes in the frame C, while the roll B runs in boxes D D, adjustable by means of set-screws E to regulate the grade of cracking or crushing.

The set-screws E are passed through hollow screws E, tapped into lugs c on the frame, and through lugs d on the boxes D, and receive nuts F on their inner ends.

The roll B is held up to its work by springs G, confined between the lugs d, and nuts H, adjustable on the hollow screws E for regulating the pressure.

The springs G are made strong enough to for which purpose they are provided .with

milled heads or hand-wheels e.

In order to impart a differential rotation to r the rolls A and B, a driving-pulley, I, is keyed on the shaft of the roll A, and a driving-pulley, J, of larger diameter, on the shaft of the roll B, and one common driving-belt, K, is passed around these pulleys and around a pulley, L, on a shaft, M, on which are also keyed eccentricsN N, carrying arms 0 O, which slide freely on rests R R, and carry a feed-box, P,

having a slide-regulator, p, as described in Letters Patent No. 239,029, dated March 22, 1881, heretofore granted to me, and provided with a suitable opening, Q,for introducing the grain. the eccentrics N delivers the grain over the serrated edge of the regulator 19 with great uniformity, and at the same time with'such certainty that, on one hand, it is supplied equally to all parts along the length of the rolls, and,

on the other hand, any backing up of the grain, so as to choke the elevators commonly used to supply machines of this class, is impossible. The belt K is also passed around a tighteningpulley, S, which runs in a housing, T, having a screw-shank, U, and a tightening-nut, u. The pulleyhousing T is held to the frame by a clamp-bolt, V, placed in a slot, '0, as shown in Fig. 3.

The relative velocity of the cracking-rolls is perfectly governed by the size of the pulleys on their respective shafts. By the use of equal pulleys the rolls may be driven in unison at equal speed, which is desirable for some purposes.

The cracked grain is delivered through a chute, W, and discharged at 20.

In operation the springs Gr resist 60 The vibratory movement imparted by 80 X represents a shutter covering a handhole, so, to permit the operator to inspect the cracked grain or chop as often as desired.

Asuitable driving-pulley, to which the power may be applied, is shown at Y.

It will be observed that my improved machine dispenses with the need of any separate belting or gearing to operate the feed.

The operation of the feed by the same belt which drives the cracking-rolls, and the further frictional resistance applied to the same belt by the tightening-pulley S, serve to hold back on the roll B, so as to prevent it being carried by friction with the driven roll A at the same velocity.

My shaking feed-box insures a uniform supply of grain at all points along the length of the cracking-rolls, and prevents the possibility of grain backing up so as to choke the elevators, whereas with roller-feed devices in common use it is well known that choking frequently results from an eXC6SSiW3 supply, while with an insufficient supply an undue proportion of the grain will pass between the rolls at the center 9r some other point. The shaking feed is perfectly automatic, and dispenses with the need of constant watching and frequent adjustment, which are required with feed-rolls.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. The combination of rolls, pulleys thereon of different diameters, a feeding device, and a pulley operating said feeding device and an endless belt common to all.

2. The combination, with the cracking or crushing rolls A B, of the driving-pulleys I J on their respective shafts, the feed drivingpulley L, the tightening-pulley S, and a belt, K, common to all.

JOHN M. CASE.

Witnesses:

OCTAVIUS KNIGHT, L. M. HOPKINS. 

